kernel/kernel.c

   1 #include <stdint.h>
   2 #include <tty.h>
   3 #include <io.h>
   4 #include <irq/idt.h>
   5 #include <irq/i8259a.h>
   6 #include <input/ps2.h>
   7
   8 extern void double_fault(struct abort_frame *frame);
   9 extern void keyb_handler(struct interrupt_frame *frame);
  10 struct idt_descriptor idt[256] __attribute__((aligned(0x10)));
  11 struct idtr idtr __attribute__((aligned(0x10)));
  12
  13 void kmain(void)
  14 {
  15         int ps2_success;
  16         screen_clear();
  17         kprint("Welcome to Nameless OS!\nRunning revision: ", 0);
  18         kprint(GIT_COMMIT, 0);
  19         kprint("\n", 0);
  20         ps2_success = ps2_initialize();
  21         switch (ps2_success) {
  22                 case -1:
  23                         kprint("No PS/2 devices found or working, we will have no input\n", 0);
  24                         break;
  25                 case 0:
  26                         kprint("Found one working PS/2 device\n", 0);
  27                         break;
  28                 case 1:
  29                         kprint("Found two working PS/2 devices\n", 0);
  30         }
  31         kprint("Preparing IDT...\n", 0);
  32         idt_set_descriptor(idt, 0x8, 0x8, (uint32_t) double_fault, IDT_TRAP_GATE, 0x0);
  33         idt_set_descriptor(idt, 0x21, 0x8, (uint32_t) keyb_handler, IDT_INTERRUPT_GATE, 0x0);
  34         kprint("IDT prepared, loading...\n", 0);
  35         populate_idtr(&idtr, idt);
  36         load_idt(idtr);
  37         kprint("IDT loaded, enabling interrupts...\n", 0);
  38         pic_init(0x20, 0x28);
  39         pic_mask_all();
  40         pic_unmask(1);
  41         asm volatile ("sti");
  42         kprint("All done\n", 0);
  43         while(1);
  44 }